Lantronix SLC 8000 Advanced Console Manager User Guide - Page 256

9: Device Ports Dial-on-demand The SLC unit automatically dial outs and establishes a PPP connection when IP traffic destined for a remote network needs to be sent. It will remain connected until no data packets have been sent to the peer for a specified amount of time. When this modem state is initiated, the SLC 8000 advanced console manager searches the site list for all sites that (a) have a Dial-out Number defined, (b) have a Static Route IP Address, Static Route Subnet Mask and Static Route Gateway defined, and (c) the Port matches the port the modem is on. A dial-on-demand connection will be started for each, waiting for IP traffic destined for a remote network. When IP traffic needs to be sent, the SLC unit dials the appropriate Dial-out Number for the site, and if the remote peer requests PAP or CHAP authentication, provides the Dial-out Login and Dial-out Password as authentication tokens. Once authenticated, a PPP session will be established using either negotiated IP addresses or specific IP addresses (determined by the Negotiate IP Address setting). The PPP connection will stay active until no IP traffic is sent for Modem Timeout seconds. Once the timeout has expired, the PPP connection will be terminated and will not be reestablished for at least Restart Delay seconds. Dial-in & Dial-on-demand A modem is configured to be in two modes: answering incoming calls to establish a PPP connection, and automatically dialing out to establish a PPP connection when IP traffic destined for a remote network needs to be sent. When either event occurs (an incoming call or IP traffic destined for the remote network), the other mode will be disabled.  For Dial-in, the user will be authenticated via PAP or CHAP (determined by the Authentication setting for the modem). For PAP, the Local/Remote User list will be used to authenticate the login and password sent by the PPP peer, and the site list will be searched for a site that (a) the Login/CHAP Host matches the name that was authenticated, (b) Authentication is set to PAP, and (c) the Port is set to None or matches the port the modem is on. For CHAP, the site list will be searched for a site that (a) the Login/CHAP Host and CHAP Secret match the name and secret sent in the CHAP Challenge response by the PPP peer, (b) Authentication is set to CHAP, and (c) the Port is set to None or matches the port the modem is on. If the remote peer requests PAP or CHAP authentication from the SLC advanced console manager, the Remote/Dial-out Login and Remote/Dial-out Password configured for the modem (not the site) will be provided as authentication tokens. If a matching site is found, its Negotiate IP Address, NAT, and Modem Timeout parameters will be used for the rest of the dial-in connection instead of the parameters configured for the modem. Once authenticated, a PPP session will be established using either negotiated IP addresses or specific IP addresses (determined by the Negotiate IP Address setting). The PPP connection will stay active until no IP traffic is sent for Modem Timeout seconds.  For Dial-on-Demand, the SLC unit searches the site list for all sites that (a) have a Dial-out Number defined, (b) have a Static Route IP Address, Static Route Subnet Mask and Static Route Gateway defined, and (c) the Port matches the port the modem is on. A dial-ondemand connection will be started for each, waiting for IP traffic destined for a remote network. When IP traffic needs to be sent, the SLC 8000 advanced console manager dials the appropriate Dial-out Number for the site, and if the remote peer requests PAP or CHAP authentication, provides the Dial-out Login and Dial-out Password as authentication tokens. Once authenticated, a PPP session will be established using either negotiated IP addresses or specific IP addresses (determined by the Negotiate IP Address setting). The PPP connection will stay active until no IP traffic is sent for Modem Timeout seconds. Once the timeout has expired, the PPP connection will be terminated and will not be reestablished for at least Restart Delay seconds. SLC™ 8000 Advanced Console Manager User Guide 256